Probably the rarest of military Harleys is the XA (Experimental Army). There are believed to be 12 worldwide 6 of them in the Wheatcroft Collection here at Donington Park.Similar to the BMW used by the germans in WW2 it has a shaft drive flat twin engine.Because it was expensive and the army prefered the Jeep only 1000 were ever made.

Actually, the picture is one of only three made XS's (H-D), only one survived; it's in H-D's Archive/ Museum.There were 1100 XA's made during 1941-43, several dozens survive to this day.About 15 in Holland, both '42 and '43 types